// {In the Name of Allah, the Most Beneficent, the Most Merciful }

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double dd;
#define mp make_pair
#define pb push_back
#define pf push_front
#define IOS ios_base::sync_with_stdio(0);cin.tie(NULL);
#define no cout<<"NO\n"
#define yes cout<<"YES\n"
#define el "\n"
int freq[27];

int main()
{
       /**/IOS/**/

       ll l,r,x,y,k;

       ll m=1e9+7;

       cin>>l>>r>>x>>y>>k;

       ll sh=(l/k)%m;

       ll sum1=((sh%m*x%m*k%m)%m+((sh-1)%m*y%m)%m)%m;

       if(l%k!=0)
          sum1+=(((l%k)%m*x%m)%m+y%m)%m;

       ll sh1=(r/k)%m;

       ll sum2=((sh1%(m)*x%(m)*k%(m))%(m)+((sh1-1)%m*y%m)%m)%m;
          if(r%k!=0)
          sum2+=(((r%k)%m*x%m)%m+y%m)%m;

          ll ans =(sum1%(m))+(sum2%(m))%m;
            cout<<ans<<endl;



}